Tool for grooving pipe



June 19, 192s. 1,674,372

l. NONNEMAN TOOIQ FOR GROOVING PIPE Filed Jamas, 1927 -2 sheets-sheet 1 June 19, 1928. l

l. W. NONNEMAN` TOOL FOR GROOVING PIPE Filed Jan.1s, 1927 2 sheets-sheet 2 Patented .lune 19, 19h28.

crear seres.

mueva IRA W. NQNNEMAN, on WARREN, oHIo, AssIGNoR To THE RQRDEN .COMRANY, or

WARREN, oHo, nl CORPORATION or R10.;

TOOL FOR GRoovI-NG RIPE. f

Application filed January 13,1927. Serial No. 160,929.

This invention relates to metal working machines and more particularly to'a`l1and operating machine which 'is used for rcutting annular grooves inthe outer surface of a pipe. One use 'for such grooves is to permit the lcooperating members of a pipe coupling to be rigidlyV attached 'toV the adjacent ends of the pipes to be joined.

An object of the present invention is to make a machine which can 4be readily operated lby hand 'to cut such a Aperipheral annular groove in a pipe, and'yet Will'have sufficient power for .enabling the cutting operation 4to be effectively accomplished '15 without necessitating unusual or extraordinary exertion by the operator. Still another yobject is to" make `a mach-ine which can be readily adjusted to various sizes of pipes Within a given range.V

A vmachine embodying my invention is `-i`l`l.ustrated in side elevation and partly in section :in `Fig. "1; Fig. 2 is' a vertical longi` Atudinal section vthrough lthe machine on a plane vindicated lbythe line v2--2 in Fig. 1;

Figs. '3 'and '4 are Vsections taken on planes indicated bythe correspondingly numbered Y p vare "diametrically opposed and are each vmounted in a canriageliwhichlis arranged Vto be moved radially within a fguidewayfBQ.

"lines in FigfQyFig ,f5 is -a section on Ian enlargedscale on a pla-ne indicated by thek .iine 5-5' inFig. '1;l While Fig. ,6 isf a" section '30 .taken on aplane indicated ibythe lline 6-6 fin Q.

In the drawings 10 indicates V'a Vpipe in n Ywhichjan 'annular "groove 11 is shown Aas being.cut'ioya machineembodying my Yinf` '35 ventionf The machine Eis shown as being mounted on the'end .of the/pipe and as having al clamping device which yextends-'into the 4pipe, `and `makes |a rigid vconnection I'there- 'fwithl More particularly7 the clamping olevice comprises, two sets Yoff vjaws which are disposed beyond :the ends 'ot Aa 'clamping block 15. 'ne' :of suchsets ofjaws embodies four members '1'6 which are pivotal-ly mounted upon v`th'een'd of a spindle 17. 'The other set of'jaws Ictnnpris'es members '18 which are vpivotaily mounted kupon a. sleeve 119. This sleeve 'has fan opening 'through which theV spindle extends, 4and 'is lpreferablya cylindrical member `"havingslots 2O 'whi ch permit movementof fthe jaws 18 in a radial directien. There are preferably four orp the jaw members "18jin this set.

y rIhe spindle v1"? 4`is 4free -to move axially withinthe 'sleeve 19 and is also free to move within the'bloclk ll5. This block has tapered orconical ends `21, which `terceith'e jawmembers outwardly against the inner surface of the pipe, whenever `the member 17 is moved outwardly andvaxially, while the sleeve '19is being 'held' against the .end of the pipe. Thus, a rigid connection can be .made with the pipein an expeditiousmanner, without Amarring the exterior surface. Moreover,y by constructing the jaw members 18vvi'th -a predetermined length, then fthe'v pipe can be gripped bysuch members at points-directly beneath the annual grove. This strengthens vthe pipe 'in the cutting region and assures `a more eiiieient cutting operation.

The sleeve 19 vsupports a casingl 25. .It also supports a gearfQG Jand a coacting pinion 27. 'Thegear vis vattached to 'the .cutter sup'- pont in such -manner as :to permit arevolving action vot-the' cutters around the pipe merely fby rotation-of the pinion. To this end, a :crank 28 may be attached to 'an1ex tension vot 'the vpinion Jshaft29 lfor. enabling the cuttingfoperation to `be Vmade advantageous position. Y

cutters BOfwfhic'h In practice. l -e'mploy two from4 an i Theseguidewaysm-ay beI cast integrally with a Vring 33, which vin turn is shown lasbeing rigidly connected lby 'securing members 34ste the gear 26)' Thisiringf member is rotatively Vmounted upoinvthe sleeve 19, and isthereforle ree ito move with relation to the pipeand the casing 25. `To this end, the sleeve-19 may have a peripheral flange 19@ which is arranged toengage ther end ofthe Vlargest' size pipe so tol position the cutters at the proper points Yon the pipe, without binding the ring `member 33 between the pipe.y and casing '25. With pipes o'f smallersizethan that shown, the ends of the pipel will engage the inner vertical Vface of the sleeve.

To advance 'the cutters'radially, I havekllvl rotated by means olf-a hand wheel '36v which I is mounted on the outer end of vthe spindle,"

while Ia lug 37, forming part of the-ring member.,supports y'the spindle; Y

. `Each ycutter may be held in place upon a carriage by means `of a cap plate 38 which ris l A shown as being clamped to the carriage by a securing member 8,9.

To limit the cutting depth upon a pipe, I prefer to provide spaced notches 40 on one side of each carriage, and to use a spring pressed plunger 46 which extends through the side of one of the guideways for engaging the notches. By having the cutters set Vto just clear the pipewhen the nose of the plunger is against the radial face of one ofV the notches, thenA ifthe cutting operation is continued, until the plunger engages the ra dial- `face of the succeeding notch, it is pos sible to gauge the depth'of the cutting withoutfrequiringvthe operator to stop the cutting operation and to gauge the work. A thumb plate 47 mounted on the end of the f plunger enables one to hold the plunger out vof engagement'with the carriage while'making an adjustment of the cutter. Y

To use a' machine embodying my invention', itis only necessary to insertthe clamp ing jaws into the end of the pipewhich previously has been clamped within a vise. The jaws are moved inwardly until the end of the sleeve 19 engages the end of the pipe, and then while the operator holds the cas- `Ving 25 with one hand, he can tighten the nut 48 upon the threaded end of the spindle 17. This moves the jaw members 16 toward the jaw members 18 and then spreads themV 'thereby to spread apart as soonas they have been. engaged bythe conical ends of the .blockgl lIt is obvious that continued tightening of the nut will effect arigid connection'with the pipe upon the inner surface thereof. If the cutters have previously been A'inserted withinthe holders, then each car` riage may beadjusted'until the nose of the plunger46 is against one of the radial Walls of the coacting notch. Thereupon the tool may -be advanced until the cutting edge engages the outer surface of the pipe, and then v Ait-'may be clamped to the carriage by tight-` ening the member 39.

This procedure is followed with both cutters. The plunger is then pulledr outwardly Vfrom engagement with the associated notch, andthe carriage is adjusted by turning the wheel 36 sufiiciently far to'permit the nose of the plunger `to clear the radial surface `of the notch.

Ordinarily a slight movement of the wheel 36 isk suiiicient to accomplish this purpose. After each cutter has been so moved, then the operator may turn the crank 28 until it turns freely, whereupon each wheel 36 is turned slightly and thefcranlr is again rotated.v This procedure is followed until the plunger strikes the radial face-.of the 'notch iny which it is traveling, and at such Vtime the cutting operation may be stopped..

if depth desired is equal to the distanceebetween the radial faces of adjacent notches.

The cutters may then be withdrawn from the grooves by reversing the direction of roconstruction.

tation of each hand wheel 36, while the nut 48 may be loosened tof permit withdrawal of the machine from the pipe. Y

' A machine made in accordance with my invention is advantageous infthat'itV permits the cutting of annular grooves upon apipe with a hand tool of simple and compact duct-ion gearing one, can make an effective cut without requiring extraordinary muscular effort. i

I claim: Y v 1. 4In ia. machine for grooving pipe, the combination of a support, means on the supportengaging the interior ,of the pipe vfor clamping the supportin place, said supportV havingmeans to abut the end of the pipe, an external gear surrounding the support and rotatablevthereon, meanson the support preventing the gear shifting longitudinally,

Moreover by the use of re- 1 a Vdriving pinion engaging thegear, a ring rotatably mounted on the support and rigidly fastened to the gear, a cutter, and means carried by the ring for supporting the cutter and for feeding it radially inward into l engagement with the exterior of the pipe.

2. In a machine of the charac-ter described,

the combination of a support, .means adaptedto enter the pipe and clamp the support in place, av gear rotatable on the support bef. yond the endV of the pipe, a cup carried by the supportand overhanging the gear, ,al ring rotatable on the support between the gear and the end of the pipe, ksaid ringl being secured to the `gear and they cup substantially abutting the ring to enclose the gear, a guideway on the ring, anda cutter movably ,mounted in said guideway and adapted to engage the pipe ata definite distance from J the end-thereof.

8. In a machine of the character described, thecombination of a support, means adapted to `enter the pipe and clamp the support in place, a gear rotatable on thesupport beyond the end of the pipe, a cupcarried lstationarily by the support and overh'anging f the gear, a ring rotatable on the support between the gear and the end of the pipe, said Y ring being `secured to the gear` and the-cup substantially abutting the ring adjacent to the outer edge thereof toenclose the gear, a pinion within the 'cup meshing with the gear, a shaft for said pinion in a bearing carried by the cup, and a cutter mounted on said `ring and adapted to engage the pipe.

lao

termined by the pawl,and a cutter carried by the block. v

5. In a device of the character described, the combination of a support provided with a movable clamp adapted to engage the interior of a pipe, a ring rotatabley on the support lbeyond the end of the pipe, a radial guideway on the ring, a block slid-able Within said guideway, said block having ratchet teeth, a pawl adapted to coact with said teeth and pro-vided with means whereby it may be withdrawn, and a screw rotatably mounted on the ring and threaded in the block, and a cutter carried by the block.

6. In a device of the character described, the combination of a support, a ring rotatable thereon, a cutter carried by the ring and adapted toengage the pipe, means for operating the ring, a slidable rod located centrally of the support, pivoted jaws carried by the inner end of the support, pivoted j aws carried by the inner end of the rod, and

a sleeve loosely mounted on the rod between ,Y

the two sets of jaws and bearing against them and adapted to distribute outward movement thereto when the rod is drawn longitudinally.

7. In'a device of the character described, the combination of a support, a ring rotatable thereon, a cutter carried'by the ring and adapted to engage the pipe, gearing carried by the support for operating the ring, a rod located centrally of the support and slidable therethrough and having a threaded outer portion, a nut on such threaded portion of the rod labutting the end of .the support, whereby the rod may be drawn signature.

` IRA W.v NONNEMAN. 

